Chimney breast removed and joists need covering up

[moe]

Hi all. I'm new here, so please go easy on me.

I've been currently renovating my house and I'm a bit of a DIYist so to say.


Anyway, I have now removed the chimney breast walls from top to bottom to gain more room size from the attic, bedrooms to the living rooms and kitchen.

I am now left in the bedrooms with exposed joists, which are 7x3 timbers and 5 metres long span.
The joist runs in a trimmer fashion and then they are connected to the joists which are running wall to wall. However, one of joists running wall to wall is not directly in the wall. This can be seen on the pictures uploaded and drawn floor plan as this help for a better understanding.

However my question is, I want to cover up the gap, but what is the proper way of securing it up and structurally having it ''passed'' off. I haven't got the building inspector involved in this, but I want to do the job securely right and mostly for the sake of peace of mind.

I have drawn 3 plans up. 1 plan is the original floor plan and the 2 are the options are which to consider on what direction I need to go. I was kind of hoping to avoid the idea of using joist hangers as I am not really keen on them. Unless someone can correct me on them if they are any good.

I have an idea on how to cover up the joists, but I need everyone's input.

I hope this information is clear. If you need more pictures please let me know.

Thanks,
Mozzer.

Edited July 24, 2023 by moe
Need to put more pictures up

[RichardL]

Lots of timbers will 'not in the wall' etc designation.

What held the floor up?

I mean - it wasn't structurally attached to the chimney breast or something was it ?

[moe]

Hi, as you can see on the 'original floor plan' picture. The floor is held up on a trimmer, while the trimmer is connected to the other timbers which are connected in wall to wall. 

[Adsibob]

Having removed the chimney breast, what is holding up your chimney? 
 

Also, is it a shared chimney, shared with an adjoining house, or is it solely yours?

[moe]

The chimney is on its own. It is not connected  to the next door neighbor's what do ever. I have uploaded a picture of the removed chimney wall from the top.

[Marvin]

1 hour ago, moe said:

I'm a bit of a DIYist so to say.

Hi @moe I think your becoming a bit more than that..

 

I think that trimmer was supported by the top of the chimney at ceiling height, otherwise I think the joists that the trimmer is fixed to would need to be doubles. (....well should be!)

 

I would not do option 2.

 

M

[Marvin]

Page 4 of 14 will help. Usually its double the existing joist (however this would not allow for load bearing walls on top as well...

 

https://www.labcwarranty.co.uk/hubfs/Technical Manual v10 Files and Images/Manual Sections/Section 10 Upper Floors.pdf